	<div class="col-sm-2">
		<div class="list-group">
		  
		  <a href="<?php echo site_url('/bus'); ?>" class="list-group-item">车辆列表</a>
		  <a href="<?php echo site_url('/bus/add'); ?>" class="list-group-item">添加车辆</a>
		  <a href="<?php echo site_url('/drivers'); ?>" class="list-group-item">司机列表</a>
		  <a href="<?php echo site_url('/drivers/add'); ?>" class="list-group-item">添加司机</a>
		</div>
	</div>